Hinge last



H. W. LUCAS HINGE LAST Dec. 2, 1939.

Filed Nov. 12, 1921 Patented Dec. 2, 1930 amc HA RYWV. Lucas, 01 noLBRooK; mAssAonusnrrs; AssrGNoR TO rim-EMPIRE DOUBLE rrvo'r ,LAs'r coMraNxorAUBUnN, "MAINE, A conronacrron or MAINE "HINGE LAs'rR Application filed- November 12, 1921. .7 Serial No. 514,722.

This invention relates to collapsible lasts,

and is disclosed inconnection with an imposi; tive lock last, that is, alast which can be collapsed by pressure alone but which oifers to collapse a definite; and increasing resistance overa short distance from the eXtended position. Lasts of this type require some sort of resilient structure to furnsh the yielding resistance. The present Jinvention greatly simplifies previously known constructions by. providing for this purpose a resilient bar or pin which, in the illustrated last, is perceptibly deformed or bent by the stresses incident to collapse and extension. In the illustrated embodiment of the invention, a resilient pressure-taking pin is provided which is 1 ar ranged to receive a bending stress, preferably resulting from the stress in a bonding mom-- ber anchoredin thelast parts, as the collapsing movementis begun, thus ofiering a;

resilient resistance to such movement. .As

illustrated, this pin or abutment resilientlyopposes movement from extended or 001- lapsed position but permits such movement on the application of suificient foree,.fand cooperates with the bonding member ,to hold the last ineither position. In the illustrated last the bonding member provides a: projection which rides over the abutment pin during the collapsing-or extending movement, bending itas it passes.

These andother features ofthe invention,

including certain details-of constructionand V combinations of parts will be best understood from the following description of a preferred embodiment selected for purposes of illustration and shown in the accompanying drawings, in which v i Flg. 1 shows a slde elevation of an llus- ,trative last embodying this invention, partly qpartdisplaced by thebend moves into the lapsing purposes. Preferably the cutconsists of a circular portion struck around a censide between its ends as shown at 29 and is abutting shoulders 18 on the two parts, re-

spe'ctively, and an open place 20 at the top of the last. The last parts arejoined by bondingmechanism comprising a link 22 anchored in the two last parts by pins and 26. i The center of the pin 26 is substantially at the center 16 so'thatthe link 22 oifers no 7 resistance to free relative movement of the last parts about the center 16. Thelast part in which the center 16 occurs is further provided with an abutment or pin 28which is.

shown in detail in Fig. 5. The pin shown in Fig. 5 isa cylindrical pin notched on one inserted in a cylindrical hole in the last,

thus formingja cavity in the last behindthe pin. It is lnade preferably of spring steel *andit is capable of bending out :of line at its center by a substantial amount without passing itselastic limit under such a force as 'can practicallybe applied to it in collapsing 'or extending. a last The pin is mounted to co-operate with a shoulder 30 in the link 22. i The parts are so arranged that asthe forepart swings about the center :16, the pin 28 is carried over the shoulder 30 from :one side to the other. The shoulder 30 will thus obviously exercise a compressive action on the pin 28, and the reduced portion in the path of movementof the pin that the pinwill bedistorted resiliently to permit" the passage of the shoulder in the collapsingmov'ement of the forepart. The resilient resistance to collapsing movement. obviously increases until the pin 28 rides directly upon the projection 30, thus furnishing an impositive lock. for the last in either extended or collapsed position.

The distortion bends'the' pin so that the space created by the cutting away of the mid- .dle part of the pin. The effect is the same as if the wood of thelast were cut away adjacent to the central portion ofa solid resilient. pin ofuniform cross-section capable of being se pin 28 is so arrangedwith relation to the of non-uniform cross-section in lasts, a skeletonized pin is preferably employed in the last of the present invention. Fig. 5 shows in dotted lines the bent or distorted form of the pin. The pin may be initially bent reversely to the bend shown in dotted lines to make it bind firmly when driven into its hole, as explained below in connection with Fig. 3.

In Figs. 3 and 4 are shown two forms of slotted pin. The pin 28B shown in Fig. 4. is formed from a solid pin, holes being bored at 36 and 38 and the slot 40 milled out between them. The pin 28A shown in Fig. 3 consists of two send-cylindrical members42 and 44 cut away on their fiat sides as at 46 and also preferably bent about a transverse axis lying in the plane of the slot formed by the cuts 46. The pin thus formed when driven into a closely fitting cylindrical hole in a last member will hold itself strongly in position due to the binding action brought about by the curvature of the two halves. Since the hole in the last is of the same size as the ends of the pin and the slot 46 is actually milled out of the halves, the pin when reduced to a. cylinder by being driven into the hole will still be slotted at its central portion. The

pin of Fig. 4: may be thus sprung initially, if

desired. These pins are both resilient by virtue of their slotted construction. They will be mounted in the last with the plane of the slot substantially tangent to the direction of relative movement of the shoulder and pin.

While I have shown the pin 28 as positioned between the pins 24 and 26, it is obvi ous that the theory of the device in no way depends on this specific construction, and the invention is not to be considered as limited in scope by the specific construction shown.

The reduction of the middle portion only of the pin leaves the ends fitting accurately in the pin hole and does not interfere with their firm bearing therein. It also increases the flexibility of the pin which must be A or inch in diameter in order to have the requisite bearing area in the wood.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A hinged last comprising a forepart, a heel part and a bonding member connecting them relatively movable to collapse the last, and a resilient transversely extending pin engaging the bonding member and constructed and arranged to be distorted by stress exerted upon it by the bonding member in the collapsing movement of the last and thereby resist the collapsing movement.

2. A last comprising a forepart and a heel part capable of relative movement to bring the last into extended or collapsed condition, a bonding member connecting the said parts, and a resilient pin which cooperates with the said last parts and bonding member in yield ingly resisting a change in the last from one of said conditions, the said pin being substantially distorted by stresses transmitted to it as a change is made in the last from that condition.

3. A last having a forepart and a heel part hinged together for relative movement into extended or collapsed condition, a bonding member hinged to each last part and a yielding pin cooperating with one of the three said elements and constructed and arranged to resist resiliently a change in the last from one of the said conditions.

t. In a collapsible last, a heel part, a forepart" and a bondingmechanism connecting them arranged for relative movement to collapse the last, and a skeletonized cylindrical pin arranged to receive stress exerted by the bonding mechanism and to be resiliently distorted thereby as the last collapses.

5. In a collapsible last, a resilient pin, and a member arranged to distort said pin substantially when the last is collapsed, whereby the collapsing movement is opposed.

6. In a collapsible last, a pin having a notch, and a member cooperating with the pin constructed and arranged to press thereon in a plane perpendicular to the pin as the last collapses, the plane of the bottom of the notch-being arranged to be substantially perpendicular to the line of prcssure.

7. A collapsible last comprising a heel part and a forepart arranged to collapse the last by relative movement, and a bar extending transversely across one last part and connected with the other, and arranged to be distorted under bending stress received from the said other part due to the relative movement, and to transmit a restoring reaction to said other part whereby the said movement is resiliently opposed.

8. In a last, a forcpart, a heel part and a bonding member joining them constructed and arranged to move relatively to collapse or extend the last, and a transversely extending resilient pin arranged to receive from the bonding member stress directed perpendicularly to its length as the last parts move relatively and to be distorted substantially under the stress, whereby it will resist relative movement of the last parts from collapsed or extended position.

9. In a last, a forepart and a heel part constructed and arranged to move relatively to collapse or extend the last, a transversely extending pin arranged to receive a deforming stress as the last parts move relatively, and means to transmit to said pin a deforming stress as the last parts move relatively, the last being provided with a space in connection with the pin to permit deformation of the pin under the stress.

10. In a last, a forepart and a heel part ar ranged to move relatively to collapse or e):- tend the last, a bonding member connectlUU knuckle, a bonding member uniting the parts, and a pin coacting w1th the bonding memher, said pin being substantially off the center of said knuckle, whereby the collapse of the last exerts a bending stress on and bends the pin, there being also a space provided in the last adjacent to the pin to facilitate the bends ring of the pin under the said stress.

12. A collapsiblelastcomprising a heelpart and a forepart and a bonding member anchored in the said parts, all constructed and arranged to permit collapse of the last, and a pin extending transversely through the last and resiliently co-operating with the bonding member and last parts to form an impositive lock for the last.

13. A collapsible last comprising a heel part, a torepart and a metallic bonding link uniting said parts and having a projection, and a pin mounted in one of the last parts and arranged to move relatively over the projection and to bind thereon during the col lapsing movement, whereby the projection will exert a bending stress on the pin and the collapsing movement will be Opposed.

14. In a last, a forepart and a heel part constructed and arranged to move relatively to collapse the last, a bonding member uniting the parts, and a resilient pin, the last parts and member being constructed to exert a bending stress on the pin'as the last starts to collapse, the pin being mounted in a hole which fits it at one point in its length and which is of substantially larger cross-section than it at another point in its length, to permit the pin to bend substantially as the last collapses.

15. In a last, a forepart and a heel part constructed and arranged to move relatively to collapse the last, a member mounted in one part and swinging in the other part as the last collapses, said member having-a projection, and a pin mounted in the said other last part, said pin having a reduced central portion, said pin and member being arranged so that the projection passesover the pin as the last is collapsed and exerts a bending stress upon it, and the reduced portion of the pin being arranged on that side of the pin toward which the bending stress tends to distort it.

constructed and arranged to move relatively to collapsethe last, a link uniting the parts, said link having a projection arranged to move relatively to one of the last parts as the last collapses, and a pin mounted in the said last-mentioned last part and so arranged with relation to the projection that] the projection moves overit and exerts a compressive stress upon it during'a collapsing movement of'the last,said pin being. also placed substantially at right angles to the. direction of said compressive stress, andlhaving a cavity in the last iadjacent to it upon that side of it,

toward whichyit-islbentby said stress per-, mitting the distortion otthe pinaunder'the v sai dstress without injuryto the last;-

'17. A hinge last comprisinga forepartand a heel part capable o'l mov ement between an extended andka collapsed position, a hinge memberconnecting the fore and heel parts. which will operate tomaintain them in their a assembled relation and permit them to move.

between said positions, and'a resiliently compressible abutment, extendlngtransversely' to the longitudinal axis of the last, which yield-,

ingly stresses the fore and heel parts as they move between-said positions and cooperates with the hinge member for maintain-ingthem in their e'xtendedor collapsed. position, saida hinge member having a central aperture through which'said abutment is entered;

18. A hinged last comprising a fore part and a heel part capable of movement between member connecting the fore and heel parts which will operate to maintain them in their assembled relation and permit them to move extended, and acollapsed position,a hinge;

member v connecting the fore and heel parts.

-which will operate to maintain them in their assembled relation and permit them to move between sa1dpositions, and a resil ently compressible member assoclated with the connec-;

tion between the fore part and the heel part and arranged horizontally and transversely to the longitudinal axis ofthe last, relatively to which one of said parts turns inmovement between said positions, there beingrecesses formed in the fore and heel parts to contain said member, 7 j I i j 20. A hinge last comprising a fore-part and a heel part-capable of movement'between an extended and a collapsed position, a hinge an extended and a collapsed position, a hinge member connecting the fore and heel parts 7 which will operate to maintain them in their 16. In a last, a forepartand a heel part assembled relation and permit them to move between said positions,:and aresiliently compressible member from which is transmitted to the fore and heel parts a yielding stress as aperture through which said compressible member is entered.

21. A hinged last comprising a fore part and a heel part capable of movement between an extended and a collapsed position, a hinge member pivotally mounted in both the fore and heel parts which will operate to maintain them in their assembled relation and permit them to move between said positions, and a resiliently compressible abutment, relatively to which one of said fore and heel parts rotates as the fore and heel parts move relatively in collapse, and co-operating with the hinge member to hold the fore and heel parts in their extended or collapsed positions.

22. A hinged last comprising a fore part and a heel part capable of movement between an extended and a collapsed position, a bonding member connecting them constructed and arranged to permit them to move from one of the said positions to the other, and a resiliently distortable pin arranged resiliently to resist such movement and to cooperate With the bonding member to hold the last in extended or collapsed position.

23. A hinged last comprising a heel part, a fore part, and a resiliently distortable pin constructed and arranged to be distorted by a collapsing movement of the last, and yieldingly to resist movement from extended position, but to have its resistance overcome by a sufiicient pressure thereby permitting collapse of the last.

24. A hinged last comprising a heel part, a

; forepart, and a cylindrical, resiliently distortable pin constructed and arranged to be distorted by a collapsing movement of the last and yieldingly to resist movement from extended position, but to yield to the distorting stress under a sufiicient pressure, thereby permitting collapse of the last, the last having a hole in which the pin is mounted and which is substantially larger than the pin at its middle portion, but which fits the pin at its ends.

25. In a last, three elements, namely, a heel part, a forepart and bonding means connecting them arranged to permit relative movement of the last parts in extension and collapse, and a resilient member mounted in the last and arranged to receive a compressive stress on its periphery from one of the said three elements as the last moves from eX- tended or collapsed position, the resilient memberhaving a. cavity therein to facilitate distortion of the periphery of the resilient member under the compressive stress.

In testimony whereof I have signed my name to this specification.

HARRY w. LUCAS. 

